ALGAE

  • 제32권2호
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  • Pages.131-137
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  • 2017
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  • 1226-2617(pISSN)
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  • 2093-0860(eISSN)
한국조류학회(藻類) (The Korean Society of Phycology)
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Physiological effects of copper on the freshwater alga Closterium ehrenbergii Meneghini (Conjugatophyceae) and its potential use in toxicity assessments

  • 투고 : 2017.02.02
  • 심사 : 2017.05.24
  • 발행 : 2017.06.15
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초록

Although green algae of the genus Closterium are considered ideal models for testing toxicity in aquatic ecosystems, little data about the effects of toxicity on these algal species is currently available. Here, Closterium ehrenbergii was used to assess the acute toxicity of copper (Cu). The median effective concentration ($EC_{50}$) of copper sulfate based on a dose response curve was $0.202mg\;L^{-1}$, and reductions in photosynthetic efficiency ($F_v/F_m$ ratio) of cells were observed in cultures exposed to Cu for 6 h, with efficiency significantly reduced after 48 h (p < 0.01). In addition, production of reactive oxygen species significantly increased over time (p < 0.01), leading to damage to intracellular organelles. Our results indicate that Cu induces oxidative stress in cellular metabolic processes and causes severe physiological damage within C. ehrenbergii cells, and even cell death; moreover, they clearly suggest that C. ehrenbergii represents a potentially powerful test model for use in aquatic toxicity assessments.

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참고문헌

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  1. Assessing the toxicity of copper oxide nanoparticles and copper sulfate in a tropical Chlorella pp.1573-5176, 2018, https://doi.org/10.1007/s10811-018-1408-3
  2. Interactive effects of temperature and copper toxicity on photosynthetic efficiency and metabolic plasticity in Scenedesmus quadricauda (Chlorophyceae) pp.1573-5176, 2018, https://doi.org/10.1007/s10811-018-1574-3
  3. Photosynthetic and biochemical responses of the freshwater green algae Closterium ehrenbergii Meneghini (Conjugatophyceae) exposed to the metal coppers and its implication for toxicity testing vol.56, pp.6, 2018, https://doi.org/10.1007/s12275-018-8081-8
  4. Differential transcriptional responses of carotenoid biosynthesis genes in the marine green alga Tetraselmis suecica exposed to redox and non-redox active metals pp.1573-4978, 2019, https://doi.org/10.1007/s11033-018-04583-9
  5. Small heat shock protein genes of the green algae Closterium ehrenbergii: Cloning and differential expression under heat and heavy metal stresses vol.34, pp.9, 2019, https://doi.org/10.1002/tox.22772
  6. The herbicide alachlor severely affects photosystem function and photosynthetic gene expression in the marine dinoflagellate Prorocentrum minimum vol.55, pp.7, 2017, https://doi.org/10.1080/03601234.2020.1755198